@article{conner_jayaprakash_cundari_gunnoe_2004, title={Synthesis and reactivity of a coordinatively unsaturated ruthenium(II) parent amido complex: Studies of X-H activation (X = H or C)}, volume={23}, ISSN={["1520-6041"]}, DOI={10.1021/om049836r}, abstractNote={Article discussing the synthesis and reactivity of a coordinatively unsaturated Ruthenium(II) parent amido complex and studies of X-H activation (X = H or C).}, number={11}, journal={ORGANOMETALLICS}, author={Conner, D and Jayaprakash, KN and Cundari, TR and Gunnoe, TB}, year={2004}, month={May}, pages={2724–2733} }
 @article{conner_jayaprakash_wells_manzer_gunnoe_boyle_2003, title={Octahedral Ru(II) amido complexes TpRu(L)(L ')(NHR) (Tp = hydridotris(pyrazolyl)borate; L = L ' = P(OMe)(3) or PMe3 or L = CO and L ' = PPh3; R = H, Ph, or Bu-t): Synthesis, characterization, and reactions with weakly acidic C-H bonds}, volume={42}, ISSN={["1520-510X"]}, DOI={10.1021/ic034410a}, abstractNote={The octahedral Ru(II) amine complexes [TpRu(L)(L')(NH(2)R)][OTf] (L = L' = PMe(3), P(OMe)(3) or L = CO and L' = PPh(3); R = H or (t)Bu) have been synthesized and characterized. Deprotonation of the amine complexes [TpRu(L)(L')(NH(3))][OTf] or [TpRu(PMe(3))(2)(NH(2)(t)Bu)][OTf] yields the Ru(II) amido complexes TpRu(L)(L')(NH(2)) and TpRu(PMe(3))(2)(NH(t)Bu). Reactions of the parent amido complexes or TpRu(PMe(3))(2)(NH(t)Bu) with phenylacetylene at room temperature result in immediate deprotonation to form ruthenium-amine/phenylacetylide ion pairs, and heating a benzene solution of the [TpRu(PMe(3))(2)(NH(2)(t)Bu)][PhC(2)] ion pair results in the formation of the Ru(II) phenylacetylide complex TpRu(PMe(3))(2)(C[triple bond]CPh) in >90% yield. The observation that [TpRu(PMe(3))(2)(NH(2)(t)Bu)][PhC(2)] converts to the Ru(II) acetylide with good yield while heating the ion pairs [TpRu(L)(L')(NH(3))][PhC(2)] yields multiple products is attributed to reluctant dissociation of ammonia compared with the (t)butylamine ligand (i.e., different rates for acetylide/amine exchange). These results are consistent with ligand exchange reactions of Ru(II) amine complexes [TpRu(PMe(3))(2)(NH(2)R)][OTf] (R = H or (t)Bu) with acetonitrile. The previously reported phenyl amido complexes TpRuL(2)(NHPh) [L = PMe(3) or P(OMe)(3)] react with 10 equiv of phenylacetylene at elevated temperature to produce Ru(II) acetylide complexes TpRuL(2)(C[triple bond]CPh) in quantitative yields. Kinetic studies indicate that the reaction of TpRu(PMe(3))(2)(NHPh) with phenylacetylene occurs via a pathway that involves TpRu(PMe(3))(2)(OTf) or [TpRu(PMe(3))(2)(NH(2)Ph)][OTf] as catalyst. Reactions of 1,4-cyclohexadiene with the Ru(II) amido complexes TpRu(L)(L')(NH(2)) (L = L' = PMe(3) or L = CO and L' = PPh(3)) or TpRu(PMe(3))(2)(NH(t)Bu) at elevated temperatures result in the formation of benzene and Ru hydride complexes. TpRu(PMe(3))(2)(H), [Tp(PMe(3))(2)Ru[double bond]C[double bond]C(H)Ph][OTf], [Tp(PMe(3))(2)Ru=C(CH(2)Ph)[N(H)Ph]][OTf], and [TpRu(PMe(3))(3)][OTf] have been independently prepared and characterized. Results from solid-state X-ray diffraction studies of the complexes [TpRu(CO)(PPh(3))(NH(3))][OTf], [TpRu(PMe(3))(2)(NH(3))][OTf], and TpRu(CO)(PPh(3))(C[triple bond]CPh) are reported.}, number={15}, journal={INORGANIC CHEMISTRY}, author={Conner, D and Jayaprakash, KN and Wells, MB and Manzer, S and Gunnoe, TB and Boyle, PD}, year={2003}, month={Jul}, pages={4759–4772} }
 @article{conner_jayaprakash_gunnoe_boyle_2002, title={Ruthenium(II) anilido complexes TpRuL(2)(NHPh): Oxidative 4,4 '-aryl coupling reactions (Tp = hydridotris(pyrazolylborate); L = PMe3, P(OMe)(3), or CO)}, volume={21}, ISSN={["1520-6041"]}, DOI={10.1021/om0206406}, abstractNote={Reactions of the Ru(II) amido complexes TpRuL2(NHPh) (L = CO, PMe3, or P(OMe)3) with AgOTf (OTf = trifluoromethanesulfonate) yield the binuclear complexes [TpRuL2NH(C6H4−)]2[OTf]2 along with the Ru(II) amine complexes [TpRuL2(NH2Ph)][OTf] in an approximate 1:1 molar ratio. In these reactions, the two ruthenium fragments are coupled via C−H bond cleavage and C−C bond formation at the para position of anilido ligands. A resonance structure corresponding to Ru(II) metal centers linked by a diimine ligand contributes significantly to the bonding. Evidence for such a contribution comes from the diamagnetic nature of the binuclear complexes and a solid-state X-ray crystallographic study of [TpRu{P(OMe)3}2NH(C6H4−)]2[OTf]2. It is proposed that the coupled products are formed via initial single-electron oxidation followed by C−C bond formation. Variable-temperature NMR spectra of the aryl-coupled complexes are consistent with two geometrical isomers around the rigid HN−C6H4−C6H4NH bridges.}, number={24}, journal={ORGANOMETALLICS}, author={Conner, D and Jayaprakash, KN and Gunnoe, TB and Boyle, PD}, year={2002}, month={Nov}, pages={5265–5271} }